CCR Anchor 4: Determine or clarify the meaning of unknown and multiple-meaning words and phrases by using context clues, analyzing meaningful word parts, and consulting general and specialized reference materials, as appropriate.
Determine or clarify the meaning of unknown and multiple-meaning words and phrases, choosing flexibly from an array of strategies.
c. Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., addition, additional).
More information and the complete College and Career Readiness Standards can be found here.